[PATCH 10/10] sstate/bitbake.conf: Use pigz if available

[Richard Purdie <richard.purdie@linuxfoundation.org>]

Currently the compression of sstate objects is single threaded. In the case
of ltp, this takes around 33s. If we add pigz into the list of non-fatal
HOSTTOOLS and then use if it available when building the sstate object,
this time drops to around 6s.

Since pigz is now widely available this is an optimisation we should
utilise.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 meta/classes/sstate.bbclass | 11 +++++++++--
 meta/conf/bitbake.conf      |  2 +-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 5a0722567a5..350d3107f59 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -715,17 +715,24 @@ sstate_task_postfunc[dirs] = "${WORKDIR}"
 #
 sstate_create_package () {
 	TFILE=`mktemp ${SSTATE_PKG}.XXXXXXXX`
+
+        # Use pigz if available
+        OPT="-cz"
+        if [ -x "$(command -v pigz)" ]; then
+            OPT="-I pigz -c"
+        fi
+
 	# Need to handle empty directories
 	if [ "$(ls -A)" ]; then
 		set +e
-		tar -czf $TFILE *
+		tar $OPT -f $TFILE *
 		ret=$?
 		if [ $ret -ne 0 ] && [ $ret -ne 1 ]; then
 			exit 1
 		fi
 		set -e
 	else
-		tar -cz --file=$TFILE --files-from=/dev/null
+		tar $OPT --file=$TFILE --files-from=/dev/null
 	fi
 	chmod 0664 $TFILE
 	mv -f $TFILE ${SSTATE_PKG}
diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 8f738545995..e28f3c7311c 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -490,7 +490,7 @@ HOSTTOOLS += " \
 HOSTTOOLS += "${@'ip ping ps scp ssh stty' if (bb.utils.contains_any('IMAGE_CLASSES', 'testimage testsdk', True, False, d) or any(x in (d.getVar("BBINCLUDED") or "") for x in ["testimage.bbclass", "testsdk.bbclass"])) else ''}"
 
 # Link to these if present
-HOSTTOOLS_NONFATAL += "aws ccache gcc-ar gpg ld.bfd ld.gold nc sftp socat ssh sudo"
+HOSTTOOLS_NONFATAL += "aws ccache gcc-ar gpg ld.bfd ld.gold nc pigz sftp socat ssh sudo"
 
 # Temporary add few more detected in bitbake world
 HOSTTOOLS_NONFATAL += "join nl size yes zcat"
-- 
2.17.1